Why do you think fuel pressure is wrong at where you indicated? If anything, what stands out is how the pressure goes negative. Also, it appears to me that the pump quit running about half way during the duration of your cranking.

Whatever fuel system you have there is obviously not holding pressure. Of course we have no idea what you are working on. It might be normal for that vehicle, I don't know.

Why did you use engine cranking current in the second capture instead of using a low current probe on the fuel pump circuit?